TM 9-2320-387-24-l REFERENCE INFORMATION The lights are the only circuit on the vehicle which should work or be drawing any power when the switch is in the STOP position. Check the instruments, try turning on the heater fan, listen for any relay clicking or other sign (includes engine running) that power is on when it shouldnt be. Its best if you use the STEKE-R in TK mode to verify that there is no current draw from the batteries. You cant use the DCA mode for this because it will measure this current during the calibration part of the test and read that this is just an offset in the sensor. The lights should work with the rotary switch in any position. ELECTRICAL DC CURRENT 9-l ,590 AMPS STMCE-R TEST 90 1. Connect probe. 2. Start Test 90, DC amps. 3. Displayed reading is in amps. 2-77